File:Remains of the south jetty - geograph.org.uk - 1804661.jpg

English: Remains of the south jetty Not long before taking this photo, and while I was crossing the Erskine Bridge, I had spotted this feature as a conspicuous crannog-like structure (see 1804699 for that view); however, when I reached the shore to take this photo, I noticed that the apparent causeway looked no more than a few centuries old. Later, at home, a look at the first-edition OS map confirmed my doubts, and revealed the true nature of the structure: it is simply the remains of the "south jetty" that is shown on the first-edition map (surveyed in 1860); I passed this information on to WoSAS (see the end-note).

For a later picture, taken on a better day, see 1941688.

As the name suggests, the south jetty was one of a pair; both jetties originally had beacons at the end (the large rounded area that is visible at the end of the south jetty supported the beacon). The corresponding north jetty is located not far away, on the other side of the Erskine Bridge (which appears in the left-hand side of the photo), and is better preserved, retaining its beacon.

Incidentally, the Canmore link in the end-note provides a useful aerial photograph of the area around the remains of the south jetty. In that photo, the remains can be seen just to the left of the far end of the Erskine Bridge. Also visible, on both sides of the Clyde, are the former slipways of the Erskine Ferry, on which, see https://www.geograph.org.uk/gridref/NS4672?user=7544

There is, about 900 metres downriver, a genuine crannog at Erskine (see http://canmore.rcahms.gov.uk/en/site/43313/details/erskine+bridge+river+clyde/ at Canmore) for details.